I was playing in my world and told my pet wolves to sit, some minutes later I closed the game, then, when I reopened it, I could not stand up my wolves again, they got stuck in their place. Tried feeding them, punching them and restart the game but none of these worked.
Minecraft Version: 1.10.2
Mods: Yes (Forge-Xaero's Minimap, Optifine)
Game Mode: Single Player
Connection: Connected to Internet
PS: Also tried logging off/on (in same account), disabling internet connection and playing without mods, but none of these could make it work.
Best Answer
You could do what Daniel G said and break the block that they're standing on. If that doesn't work, since it seems like you tried everything, I would suggest reporting a bug on the bug tracker for Minecraft.
Here's the link: Bug Tracker